• Opioid and Polydrug Use Among Patients in Opioid Maintenance Treatment 

      Carlsen, Siv-Elin Leirvåg; Lunde, Linn-Heidi; Torsheim, Torbjørn (Journal article; Peer reviewed, 2020)
      Purpose: Opioid maintenance treatment reduces a person’s use of heroin. However, frequent substance use in treatment is a problem. Aim: To examine the association between opioid maintenance treatment and opioid/polydrug ...